Method of making electrical conductors



Feb. 26, 1935.

H. A STAPLES METHOD OF MAKING ELECTRICAL CONDUCTQRS Filed Nov. 3, 1933ll Ill ATTO NE/Y "20 The object of my invention is to produce a tension,so that a tight and quiet lay is secured. 20

40 tures which I believe to be new and of my'own comprising uniformlyreducing the diameter of 40 Patented Feb. 26,1935 1,992,639

UNITED STATES PATENT OFFICE METHOD OF MAKING ELECTRICAL connuc'ronsHorace A; Staples, Plainfield, NHL, assignor to Phelps Dodge 'CopperProducts Corporation, New York, N. Y.', a corporation of New YorkApplication November 3, 1933, Serial No. 696,482 .5 Claims. (01. 2054)My invention relates to a method of making drawing dies 25. The wiresare drawn through standard electrical conductors for the transmisthedies 25 and directed through the closing die sion of electric current,and has for its object the 28 from which they proceed in theform of adevelopment of a method that will produce a stranded cable.

cable in which the individual strands will have As the operation of thisstranding headis well; 5

a more perfect lay without caging or bunching. known to those skilled inthe art of cable mak- Heretofore, in the conventional method of mg, 'nofurther description is here required or. stranding, the individual wireshave been laid into necessary for a, complete understanding of the thecable without straightening. Suchwires have invention.

a spiral cast into them by the unwinding from I have illustrated myinvention as practiced 10 the stranding spool; this spiral'interfereswith with the use of a standard planetary stranding their laying into auniform strand. It is also demachine, but I may use any type ofstranding ma- .sirable that the wires be laid into the strand chine,such as a rigid frame strander or a high under tension, which should beuniform for each speed strander or. a buncher.

wire. In the ordinary method of stranding this By means of the drawingdie the wire is not 15 tension has been securedby frictions on the onlyreduced in diameter but is straightened andstranding spools. Unlessexcessive time is spent leaves the die with substantially a uniformtenin the adjustment of these frictions the'tension sion and it isbentinto stranded form at-the is liable to be different for the individualwires. closing die 28 under this substantially uniform method 0fstranding in which the wires are I wish it distinctly understood thatmymethod straightened, and free from spiral casts and acherein describedand illustrated is in the form in cidental kinks and are laid into thestranded cable which I desire touse it and that changes or variawithuniform tension on the individual wires. tions may be made as may beconvenient or desir- 25 I have-also found that wire can be strandedable-without departing from the salient features of 25 into a moreperfect lay if it is drawn through a. my invention and I thereforeintend the following reducing die simultaneously with the strandingclaims to cover such modificationsasnaturally fall operation which notonly removes the spiral cast within the lines of invention. I claim:- Ybut puts tension on the wire as it is formed into 1. The method ofmaking electrical conductors 30 the strand, and in fact, I have foundthat this comprising drawing the individual wires oversize 3o drawingthrough a die simultaneously with the and giving each strand a draftthrough a die apstranding operation is beneficial to the strandingplying'a balanced circumferential pressure to the of both solid andhollow wire. strand in the stranding operation.

- The foregoing and other features of my inven- 2. The method of malnngelectrical conductors, tion' will now be described in connection withcomprising uniformly reducing the diameter of 35 e the accompanyingdrawing forming part of this the individual wires by a drawing operationand specification in which I have represented apreinstantly strandingthe wires into a cable with ferred way in carrying out my method aftersubstantially uniform tension. 4 which I shall point out in the claimsthose fea- 3, The method of making electrical conductors invention. vthe individual wires by successive draw op- In the drawing:- erationsand stranding the wires during the last Figure 1 shows diagrammaticallya preferred draw with substantially uniform tension on all way my methodmay be carried out. wires.

5 In the c rrying out of my invention, I draw my 4. The method of makingelectrical conductors as individual wires to a diameter larger than thewhich consists in removing the spiral cast due to diameter which I wishin my stranded cable and unwinding of the individual wires from theirthen give them a final draw at the time of spools by a drawing operationin which a bals ran n T i ac omplishes iZW "V6 'y"i!! 1l- 0 ancedcircumferential pressure is givenito each tant functions.- Itstraightens the wire free from wire and simultaneously stranding thestraight- I 50 the spiral cast due to its unwinding from a spool,enedwires into a cable. I at the same time it putsall the wires to be' J5. The method of making electrical conductors stranded undersubstantially uniform tension. which consists in removing thespiral'cast due to This maybe carried outon any standard strandunwindingof. the individual from their ing machine in which is provided'arotating end :po'ols by a drawing operation in which a bal 5'5 69-mounted a member 24 carrying a'plur'ality of 21 upon which'is mounted aframe 22 adapted 'ancedcircumferential pressure is given to each tocarry a plurality of coils of wire 23: disposed wire and simultaneouslystranding the straight-' radially around the frame 22, (only two suchened wires into a cable with substantially -uni- 5 coils being shown).On the spindle 211s also form tension.

HORACE A. STAPLES. to

